Do not be sad about what you do not have. Instead, be happy about what you do have. If you will be sad about what you don't have, you will not be happy about what you do have.

From the child of five to myself is but a step. But from the newborn baby to the child of five is an appalling distance.

In the best, the friendliest and simplest relations flattery or praise is necessary, just as grease is necessary to keep wheels turning.

But that's just the aim of civilization - to make everything a source of enjoyment.

One of the first conditions of happiness is that the link between Man and Nature shall not be broken.

Just when the question of how to live had become clearer to him, a new insoluble problem presented itself - Death.

In education, once more, the chief things are equality and freedom.